Vulnerability identifier: #VU28829

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1181

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft SharePoint Server
Server applications / Application servers
Microsoft SharePoint Foundation
Server applications / Application servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to the Microsoft SharePoint Server fails to properly identify and filter unsafe ASP.Net web controls. A remote authenticated attacker can create a specially crafted page and upload an XML file containing an arbitrary Web Part definition, which may result in remote code execution n the context of the service account.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2016 - 2019

Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1181
http://www.zerodayinitiative.com/advisories/ZDI-20-694/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.